No Sheathing For Metal Roof

This old house general contractor tom silva prefers this route even when the roof is just a single layer so he can find the source of any water damage upgrade the flashing and install.

No sheathing for metal roof.

One of the most common mistakes that diy homeowners make with their metal roof is that they do not lay down any type of paper wrap on the sheathing. Check around the ceiling to ensure your metal roof is supported by plywood or osb sheathing. Owners of agricultural buildings man caves and horse barns all are worried about the corrosive effects of condensation. The most common material used for an insulating metal roof is fiberglass batts or glass mineral wool.

Here s how to fight back against the enemy within. If your metal roof does not have plywood installed underneath you should not attempt to install spray foam yourself. The batts are located side to side on the rafter of the roof. More expensive because of the additional labor and materials peeling off the old roof down to the sheathing is your only option if you already have two layers.

How to prevent condensation under a metal roof. This paper wrap is important to the health of the home by not allowing water to build up in the space between the sheathing and the metal roof. It could spread through the seams in the roof and cause significant damage. July 28 2017.

For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. Some metal roofs are installed without this sheathing. Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes.